Does It Make Sense? Decide whether the statement makes sense (or is clearly true) or does not make serise (or is clearly false). Explain clearly; not all these have definitive answers, so your explanation is more important than your chosen answer. 15. I make it a habit to be weightless for at least a fraction of a second every day. 16. Suppose you could enter a vacuum chamber (a chamber with no air in it) on Earth. Inside this chamber, a feather would fall at the same rate as a rock. 17. When an astronaut goes on a space walk outside the Space Station, she will quickly float away from the station unless she has a tether holding her to the station. 18. I used Newton's version of Kepler's third law to calculate Saturn's mass from orbital characteristics of its moon Titan. 19. If the Sun were magically replaced with a giant rock that had precisely the same mass. Earth's orbit would not change. 20. The fact that the Moon rotates once in precisely the time it takes to orbit Earth once is such an astonishing coincidence that scientists probably never will be able to explain it. 21. Venus has no oceans, so it could not have tides even if it had a moon (which it doesn't). 22. If an asteroid passed by Earth at just the right distance, Earth's gravity would capture it and make it our second moon. 23. When I drive my car at 30 miles per hour, it has more kinetic energy than it does at 10 miles per hour. 24. Someday soon, scientists are likely to build an engine that produces more energy than it consumes